仿木材料抗拉强度与应力-应变曲线试验研究  

Experimental Study on the Tensile Strength and Stress-Strain Curve of Imitation Wood Material

作　　者：王安选 张华刚[1,2] 杨娇娇 吴小强 武绍元 WANG Anxuan;ZHANG Huagang;YANG Jiaojiao;WU Xiaoqiang;WU Shaoyuan(Space Structure Research Center,Guizhou University,Guiyang 550025,China;Key Laboratory of Structural Engineering of Guizhou Province,Guiyang 550025,China;Sinohydro Bureau 9 Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550025 [2]贵州省结构工程重点实验室,贵州贵阳550025 [3]中国水利水电第九工程局有限公司,贵州贵阳550081

出　　处：《贵州大学学报（自然科学版）》2024年第2期110-115,共6页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金资助项目(52068008)。

摘　　要：仿木材料是以氯氧镁水泥为基体,植物纤维为增强体,并添加柠檬酸、酒石酸、六偏磷酸钠搅拌均匀后经高压静置固化成型的无机胶凝材料,为研究其抗拉强度和抗拉本构关系,制作了30个试件进行轴心受拉试验,共采集到22个试件的有效数据。结果表明:仿木材料的轴心抗拉强度为7.98 MPa,变异系数为0.121,抗拉弹性模量为3600 MPa,变异系数为0.089,轴心拉力作用下,材料达到峰值应力后应力迅速下降,试件脆性破坏;根据应力、应变测试结果,拟合得到了材料的轴心抗拉本构关系,可供材料非弹性应用时参考。Imitation wood material,an inorganic cementitious material,is formed by taking magnesium oxychloride cement as the matrix,plant fiber as the reinforcement,then adding citric acid,Tartaric acid and Sodium hexametaphosphate and mixing evenly,and finally curing under high pressure.In order to study its tensile strength and tensile constitutive equation,30 specimens were made for axial tension test,and effective data of 22 specimens were collected.The results show that the axial tensile strength of Imitation wood material is 7.98 MPa,the coefficient of variation is 0.121,the tensile modulus of elasticity is 3600 MPa,and the coefficient of variation is 0.089.Under axial tension,the stress of the material rapidly decreases after reaching the peak stress,leading to brittle failure of the specimen.According to the stress and strain test results,the axial tension constitutive equation of the material is obtained by fitting,which can be used as a reference for the inelastic application of materials.

关 键 词：仿木材料 轴心抗拉强度 弹性模量 应力-应变曲线 

分 类 号：TU526[建筑科学—建筑技术科学]